Multiplexing system setting through mask registers

Details Multiplexing system setting through mask registers Multiplexing system setting through mask registers

1989-08-23

1990-10-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 581, 370 62, H04J 300

Patent

active

049611895

ABSTRACT:
Data multiplexing system for dispatching an input serial bit stream onto a plurality of ports, or multiplexing the data bits received from a plurality of ports as a serial bit stream. The system mainly comprises for each port, a mask register (14) loaded with a N-bit mask work wherein bits set to 1 indicate which bits of an aggregate register (10 or 56) are to be loaded or to be transferred, and a scan counter (20 or 46) starting being incremented at a high frequency at each transition of a first category, up or down, of a clock circuit (12 or 40), until the mask bit corresponding to the scan counter contents is a bit 1, whereby the corresponding cell of the aggregate register is transmitted to the associated port or loaded with the bit received at this time by the associated port.

REFERENCES:
patent: 4535452 (1985-08-01), Sandberg et al.
patent: 4759018 (1988-07-01), Buchner
patent: 4789984 (1988-12-01), Swartz
patent: 4823365 (1989-04-01), Loginov
patent: 4849969 (1989-07-01), Annamalai

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